Pat the chicken breast dry and cut into 1-inch cubes.
In a small bowl, toss the chicken with arrowroot starch, sea salt, and black pepper until evenly coated.
Heat avocado oil in a large skillet over medium-high heat.
Add the chicken to the skillet and sear until crispy and golden on all sides, about 5-6 minutes.
Remove chicken from the pan and set aside.
Add the bell peppers and broccoli to the same pan, sautéing for 3-4 minutes until crisp-tender.
In a small jar, whisk together the pineapple juice, coconut aminos, and rice vinegar.
Pour the sauce into the skillet with the vegetables and bring to a simmer.
Add the chicken back into the pan and toss until the sauce thickens and glazes the ingredients.
Serve the stir-fry over the warm jasmine rice.